Bug 1439270

Summary:	NSS/TLS: Alert sent by server upon receiving malformed extended master secret extension is incorrect
Product:	Red Hat Enterprise Linux 7	Reporter:	Hubert Kario <hkario>
Component:	nss	Assignee:	Daiki Ueno <dueno>
Status:	CLOSED ERRATA	QA Contact:	Hubert Kario <hkario>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.4	CC:	dueno, kengert, szidek
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	nss-3.34.0-0.1.beta1.el7	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-04-10 09:25:43 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Hubert Kario 2017-04-05 14:43:45 UTC

Description of problem:
When server receives malformed EMS extension, it replies with handshake_failure instead of decode_error.

Version-Release number of selected component (if applicable):
nss-3.28.3-4.el7.x86_64

How reproducible:
always

Steps to Reproduce:
git clone https://github.com/tomato42/tlsfuzzer.git
pushd tlsfuzzer
git checkout extended-master-secret-parameterise
git clone https://github.com/warner/python-ecdsa .python-ecdsa
ln -s .python-ecdsa/ecdsa ecdsa
git clone https://github.com/tomato42/tlslite-ng.git .tlslite-ng
pushd .tlslite-ng
git checkout ems-fixup
popd
ln -s .tlslite-ng/tlslite tlslite
popd
openssl req -x509 -newkey rsa -keyout localhost.key -out localhost.crt -nodes -batch -subj /CN=localhost
openssl pkcs12 -export -passout pass:  -out localhost.p12 -inkey localhost.key -in localhost.crt
mkdir nssdb
certutil -N -d sql:nssdb --empty-password
pk12util -i localhost.p12 -d sql:nssdb -W ''
selfserv -n localhost -p 4433 -d sql:./nssdb -V tls1.0: -H 1 -U 0 -G 

# in another terminal, same directory
PYTHONPATH=tlsfuzzer python tlsfuzzer/scripts/test-extended-master-secret-extension.py 'malformed extended master secret ext'


Actual results:
Server prints
selfserv: HDX PR_Read returned error -12260:
SSL received a malformed Client Hello handshake message.

Client prints:
AssertionError: Alert description 40 != 50

Expected results:
test case pass, server replies with decode_error alert

Additional info:

Comment 3 Kai Engert (:kaie) (inactive account) 2017-09-01 11:43:49 UTC

Seems to be fixed upstream, will be picked up when we rebase to NSS 3.32 or later.

Comment 11 errata-xmlrpc 2018-04-10 09:25:43 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2018:0679